Hyacinth Vases - Bulb assortment

Assortment of hyacinths
and their necessary cold-periods in weeks for forcing indoors on water.

Stated are the optimum cold-periods in weeks in 3 periods of the winter, after which the hyacinths can be forced indoors at room-temperatures to a proper length. These periods apply when the optimum temperatures during the cold/rooting period are about 9ºC (48ºF). Prior to this cold-period, the bulbs must have received the proper warmth storage period. (See also forcing hyacinths: the process).

Hyacinth cultivar (picture)	Hyacinth cultivar (variety)	Colour	Start of forcing indoors in December, after a cold periode in weeks of about:	Start of forcing indoors in January, after a cold periode in weeks of about:	Start of forcing indoors in February or later, after a cold periode in weeks of about:
	Aiolos	white	11	10	10
	Amethyst	light purple	- *	-	13
	Anna Liza	purple	10	9	-
	Anna Marie	light pink	10	9	-
	Antartica	ivory white	10	9	-
	Apricot Passion	apricot	11	10	10
	Atlantic	dark blue	10	9	-
	Blue Jacket	dark blue	-	-	13
	Blue Pearl	blue	11	10	9
	Blue Star	blue	11	10	10
	Carnegie	white	13	12	11
	China Pink	light pink	11	10	10
	Delft Blue	blue	11	10	10
	Fondant	pink	11	10	10
	Gipsy Princess	light yellow	-	-	12
	Gipsy Queen	salmon orange	-	-	12
	Jan Bos	red	-	11	10
	L'Innocence	white	10	9	9
	Marconi	light pink	-	-	13
	Minos	blue	10	9	9
	Miss Saigon	purple	-	11	10
	Multiflora hyacinth**	various
	Ostara	blue	13	12	11
	Pink Pearl	pink	11	10	9
	Purple Sensation	purple	11	10	9
	Purple Star	light purple	11	10	10
	Sky Jacket	light blue	-	-	12
	Splendid Cornelia	lilac	10	10	9
	Top White	white	11	10	10
	Viking	blue	9	8	-
	White Pearl	white	11	10	9
	Woodstock	dark purple	-	11	10

* Not suitable for this period.

** Multiflora hyacinths are specially treated big bulbs of certain varieties that produce more sprouts and flowers per bulb. The big main sprout is absent and a bunch of side bulbs will flower. The data for the given variety can be used. If the variety is not known it is best to use the data for Pink Pearl.